loop0: detected capacity change from 0 to 128 oldfs: cannot read superblock ------------[ cut here ]------------ VFS: brelse: Trying to free free buffer WARNING: CPU: 1 PID: 1995 at fs/buffer.c:1145 __brelse fs/buffer.c:1145 [inline] WARNING: CPU: 1 PID: 1995 at fs/buffer.c:1145 brelse include/linux/buffer_head.h:290 [inline] WARNING: CPU: 1 PID: 1995 at fs/buffer.c:1145 __invalidate_bh_lrus fs/buffer.c:1391 [inline] WARNING: CPU: 1 PID: 1995 at fs/buffer.c:1145 invalidate_bh_lru+0x32/0x90 fs/buffer.c:1404 Modules linked in: CPU: 1 PID: 1995 Comm: syz-executor.0 Not tainted 5.18.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2023 RIP: 0010:__brelse fs/buffer.c:1145 [inline] RIP: 0010:brelse include/linux/buffer_head.h:290 [inline] RIP: 0010:__invalidate_bh_lrus fs/buffer.c:1391 [inline] RIP: 0010:invalidate_bh_lru+0x32/0x90 fs/buffer.c:1404 Code: 53 bf 01 00 00 00 e8 2d 27 d9 ff e8 08 34 0e 01 89 c0 4c 8b 34 c5 30 c8 0f 83 31 db eb 23 48 c7 c7 5b 85 f7 82 e8 6e c9 d5 ff <0f> 0b 4b c7 84 3e c8 92 02 00 00 00 00 00 48 ff c3 48 83 fb 10 74 RSP: 0018:ffffc900029dfa00 EFLAGS: 00010046 RAX: 22777b084f94d800 RBX: 0000000000000000 RCX: 0000000000000003 RDX: 0000000000000000 RSI: ffffffff8306f3b0 RDI: 00000000ffffffff RBP: ffffc900029dfbd0 R08: 0000000000000000 R09: ffffffff832bf260 R10: 00000000ffffffff R11: 00000000ffffdfff R12: ffff88813bd2d980 R13: ffffffff8131c210 R14: ffff88813bd00000 R15: 0000000000000000 FS: 00007f66f798a6c0(0000) GS:ffff88813bd00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055dd841e3b88 CR3: 00000001017bd000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: smp_call_function_many_cond+0xa18/0x1190 kernel/smp.c:960 on_each_cpu_cond_mask+0x3a/0x60 kernel/smp.c:1135 invalidate_bdev+0x1c/0x40 block/bdev.c:86 invalidate_disk+0x19/0x60 block/genhd.c:676 __loop_clr_fd+0x252/0x390 drivers/block/loop.c:1147 loop_clr_fd drivers/block/loop.c:1230 [inline] lo_ioctl+0x899/0xa10 drivers/block/loop.c:1556 blkdev_ioctl+0x267/0x2b0 block/ioctl.c:588 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:870 [inline] __se_sys_ioctl+0x6a/0xb0 fs/ioctl.c:856 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x41/0x90 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f66f6c7c61b Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00 RSP: 002b:00007f66f7989e90 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: ffffffffffffffff RCX: 00007f66f6c7c61b RDX: 0000000000000000 RSI: 0000000000004c01 RDI: 0000000000000004 RBP: 0000000000000016 R08: 00007f66f7989f80 R09: 0000000000008003 R10: 0000000000008003 R11: 0000000000000246 R12: 0000000000000004 R13: 00007f66f7989f40 R14: 0000000000009dfc R15: 0000000020000000